Don’t Make Me Think! A Common Sense Approach to Web Usability This is how it works: If you know nothing about Usability, buy Steve Krug’s book. If you know a little about usability, buy Jakob Neilsen’s book on design, and buy Krug’s book for your boss. If you know a fair amount about usability, buy Neilsen’s book on Usability Engineering, buy Krug’s book for your boss and buy Neilsen’s design book for the designer sitting near you (if nothing else, it’ll inspire some interesting conversations.
Oh, and if you need to explain usability to anyone, you still need Steve Krug’s book. His book is sensible, funny and insightful– even if you already know everything he’s saying it’s still a pleasurable read.